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Summary of Contents for CHINT NB3LEU Series
- Page 1 NO:2020.12 NB3LEU Residual Current Operated Circuit Breaker User Instruction Standard: IEC/EN 61009-1...
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Page 2: Safety Warning
Safety Warning The product can only be installed and maintained by professionals. Installation in any damp, condensed-phase environment with inflammable and explosive gas is forbidden. When the product is being installed or maintained, the power must be switched off. You are prohibited from touching the conductive part when the product is operating. - Page 3 The product cannot protect against the danger of electric shock caused by touching both wires of the protected circuit at the same time. The product must be wired correctly in strict accordance with the wiring diagram. The product is not suitable for the direct starting of high- inductive and high-capacity loads, such as fans, electric motors, electric heating equipment, capacitor cabinets, etc.
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Page 4: Purpose Of Use
Purpose of Use The NB3LEU series residual current operated circuit breaker is applicable to circuits with frequency of AC 50/60 Hz, rated voltage up to 240 V and rated current up to 50A. It provides overload, short circuit and leakage protection, and can also be used for infrequent switching of the circuit under normal circumstances. -
Page 5: Installation
Installation 1. installation dimensions Unit:mm -1.20 57±0.37 49.5±0.31 -0.43 66.2±0.37 2. On-off indication Green I ON O OFF... - Page 6 3. Installation ① TH35-7.5 type mounting rail ② 4. Disassembly ① ②...
- Page 7 5. Wiring: Suitable for copper wire or busbar connection. See Table 2 for wire selection. Table 2 Copper wire cross-sectional area Rated current I Copper wire cross-sectional area (mm ) 10, 13 16, 20 40, 45, 50 L/OUT N/OUT N/IN N incoming 1.5 N·m FE outgoing...
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Page 8: Maintenance
Maintenance -- Check the circuit breaker on a regular basis during operation; -- After the circuit breaker cuts off the overload or short-circuit current and the residual current, the fault should be eliminated before closing the circuit breaker. Table 3 Analysis and troubleshooting of common faults Troubleshooting methods Symptoms Cause analysis... - Page 9 QC PASS NB3LEU Residual Current Operated Circuit Breaker IEC/EN 61009-1 Check 12 Test date: Please see The packing ZHEJIANG CHINT ELECTRICS CO.,LTD.
- Page 10 NB3LEU Residual Current Operated Circuit Breaker User Instruction Zhejiang Chint Electrics Co., Ltd. Add: No.1, CHINT Road, CHINT Industrial Zone,North Baixiang, Yueqing, Zhejiang 325603,P.R.China E-mail: global-sales@chint.com Website: http://en.chint.com...
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